HP L 5 manual MC Merge Control, Default

MC (Merge Control)

The MC command controls the color of pixels where two or more page marking primitives intersect on the page. This command supports all 256 Microsoft Windows ternary (ROP3) raster operation codes. A common application of the MC command is the rendering of complex polygon fill patterns. Raster Operations specify how source, destination, and patterns are combined to produce final images.

	MC mode, [opcode][;]
	Parameter	Format	Functional	Parameter
			Range	Default
	mode	clamped integer	0 or 1	0 (off)
	opcode	clamped integer	0 to 255	252 (mode=0),
				168 (mode=1)
	• Mode — defines the merge control mode as follows:
	0 (off, default) Pixels in a primitive replace corresponding
		destination pixels. If no opcode is specified,
		252 is used.
	1 (on)	Pixels in a primitive merge with
		corresponding destination pixels, creating a
		new color based on the colors of the source
		data and the contents of the destination
		(frame buffer). If no opcode is specified,168
		is used.
Note	This command is the HP-GL/2 version of the PCL Logical Operation
	command.

This command sets a ROP value which affects not only HP-GL/2 operation but also the PCL ROP value.

The MC command is defaulted by an IN command.

7-6 Color Vector Graphics (HP-GL/2) EN